Java Doc for URLChangeTracker.java in  » Web-Framework » Tapestry » org » apache » tapestry » internal » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Framework » Tapestry » org.apache.tapestry.internal.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.tapestry.internal.util.URLChangeTracker URLChangeTracker public class URLChangeTracker (Code) Given a (growing) set of URLs, can periodically check to see if any of the underlying resources has changed. This class is capable of using either millisecond-level granularity or second-level granularity. Millisecond-level granularity is used by default. Second-level granularity is provided for compatibility with browsers vis-a-vis resource caching -- that's how granular they get with their "If-Modified-Since", "Last-Modified" and "Expires" headers. Constructor Summary public   URLChangeTracker()      Creates a new URL change tracker with millisecond-level granularity. public   URLChangeTracker(boolean granularitySeconds)      Creates a new URL change tracker, using either millisecond-level granularity or second-level granularity. Method Summary public  long add(URL url)      Stores a new URL into the tracker, or returns the previous time stamp for a previously added URL. public  void clear()      Clears all URL and timestamp data stored in the tracker. public  boolean containsChanges()      Re-acquires the last updated timestamp for each URL and returns true if any timestamp has changed. public  void forceChange()      Needed for testing; changes file timestamps so that a change will be detected by URLChangeTracker.containsChanges() .  int trackedFileCount()      Needed for testing. Constructor Detail URLChangeTracker public URLChangeTracker()(Code) Creates a new URL change tracker with millisecond-level granularity. URLChangeTracker public URLChangeTracker(boolean granularitySeconds)(Code) Creates a new URL change tracker, using either millisecond-level granularity or second-level granularity. Parameters:   granularitySeconds - whether or not to use second-level granularity Method Detail add public long add(URL url)(Code) Stores a new URL into the tracker, or returns the previous time stamp for a previously added URL. Filters out all non-file URLs. Parameters:   url - of the resource to add the current timestamp for the URL, or 0 if not a file URL clear public void clear()(Code) Clears all URL and timestamp data stored in the tracker. containsChanges public boolean containsChanges()(Code) Re-acquires the last updated timestamp for each URL and returns true if any timestamp has changed. forceChange public void forceChange()(Code) Needed for testing; changes file timestamps so that a change will be detected by URLChangeTracker.containsChanges() . trackedFileCount int trackedFileCount()(Code) Needed for testing. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)